Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
![R40958-040 Piston Ring Set for 1965-1969 Chevrolet 6.5L [+0.040 in. Oversize]](https://www.jegs.com/images/mini_750/400/416/416-r40958-040.jpg)
Vehicle Info NeededENGINETECHPART NUMBER: 416-R40958-040
R40958-040 Piston Ring Set for 1965-1969 Chevrolet 6.5L [+0.040 in. Oversize]
$6999
Ships Tomorrow
Lowest Price GuaranteeItems You Need
![Mechanic Chair & Step Stool on Wheels [300 lb. Capacity]](https://www.jegs.com/images/mini_200/500/555/555-81156.jpg)
![Heavy-Duty Steel Workbench [59.5 in. x 27.5 in. Bench Top]](https://www.jegs.com/images/mini_200/500/555/555-81440.jpg)
![Engine Assembly Lube [4 oz. Bottle]](https://www.jegs.com/images/mini_200/500/555/555-28000.jpg)
![1-Ton Automotive Shop Crane [Boom Operating Range: 34 in. to 45 in.]](https://www.jegs.com/images/mini_200/500/555/555-81044k.jpg)
JEGS
Part Number : 555-81044K
$23698
![Rotating Engine Stand [1000 lb. Capacity]](https://www.jegs.com/images/mini_200/500/555/555-80059.jpg)
![Round Magnetic Parts Tray [5 1/2 in. Round]](https://www.jegs.com/images/mini_200/500/555/555-80080.jpg)
![Socket Set, 3/8 in. & 1/4 in. Drive [SAE/Metric 52-Piece]](https://www.jegs.com/images/mini_200/500/555/555-81565.jpg)
![Plier Set [5-Piece]](https://www.jegs.com/images/mini_200/500/555/555-w1717.jpg)
![Break-In Oil, 10W30 [1 Quart, 32 oz.]](https://www.jegs.com/images/mini_200/500/555/555-28067.jpg)
![Fender Cover with Pocket [23 in. W x 31 1/2 in. L]](https://www.jegs.com/images/mini_200/500/555/555-65010.jpg)
![Penetrating Oil [11 oz. Aerosol Can]](https://www.jegs.com/images/mini_200/600/639/639-11043.jpg)
![Brake Parts Cleaner [14 oz. Aerosol Can]](https://www.jegs.com/images/mini_200/500/555/555-72311.jpg)
GM
Piston Ring Set1965-1969 Chevrolet 6.5L Standard Ring Set Size: +0.040 in. Oversize Sold as a Set
The Enginetech R40958-040 is a piston ring set for 1965-1969 Chevrolet 6.5L. 5/64 5/64 3/16 engines at +0.040 in. Oversize oversize. Ring set is engineered for proper cylinder sealing and oil control.
Enginetech R40958-040 Piston Ring Set Features:
- Fitment: GM/Chevrolet, 396 ci, 421 ci
- Size: +0.040 in. Oversize
- Engineered to OE specifications for direct replacement
Part TypePiston Ring Set
BrandENGINETECH
Package Height2.0
Package Width5.0
Package Length10.0
Weight1.5 PG
Part CategoryReplacement Parts
GaplessNo
Second Compression Ring Thickness5/64
Size+0.040 in. Oversize
Top Compression Ring Thickness5/64
File FitNo
Top Ring MaterialStandard
QuantitySold as a set
Oil Ring Thickness3/16
FitmentGM/Chevrolet
Part FitmentDirect Fit
Ring Outside Diameter4.094
Vendor Part NumberR40958-040
Package Qty1
Package TypeEA
Some parts are not legal for use in California or other states with similar laws / regulations
